Harrow



(No Model.)

M. J. TODD. HARROW.

No. 446,105. A Patented Feb. 10,1891.

\Wmcssas uoims PETERS cm, FHDTO-LITHO-I'WASHINOTON, o, c.

MARQUIS J. TODD, OF OORNING, ASSIGNOR TO THE PITTS AGRICULTURAL ORKS, OF BUFFALO, NE\V YORK.

HARROW.

SPECIFICATION forming part of Letters Patent No. 446,105, dated February 10, 1891.

Application filed June 28,1890. Serial No. 357,057. (No model.)

To CLZZ whom it may concern.-

Be it known that I, MARQUIS J. TODD, of Corning, in the county of Steuben, in the State of New York, have invented new and useful Improvements in Harrows, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to improvements in harrows of the'particular class in which the harrow-tooth is pivotall y supported on the frame, and has for its object the production of a simple, strong, effective, and durable construction of harrow which is manufactured at a minimum cost of expense and presents a maximum degree of efficiency; and to this end myinvention consists, essentially, in a barrow-frame having its bars disposed in zigzag form and provided at intervals with bearing-faces for supporting the teeth, toothsupports having one extremity pivotaily supported upon said frame-bars and the other extended downwardly beneath the same, and a spring-tooth secured to said downward extension; and the further object of my invention is the elevation of the harroW-frame throughout its entire length by means of pivoting tooth supports projecting downward below the frame and carrying broad flat shoes for Wearing-surface and providing runners or frictional planes for the carrying of the harrow; also, by securing tooth at lower end of pivoting tooth support or runner the draftis maintained at a lower plane and nearer its 3 5 working end, thus lessening largely the leverage upon lower tooth-fastener and preventing frame tipping forward, as in a springing tooth curved downward from a higher plane or support.

The invention also consists in a clip-plate interposed between the harrow-frame bar and the upper extremity of the tooth-support, in

a clip-plate for securing the tooth to the lower extremity of the tooth-support, and in the 5 detail construction and arrangement of the parts, all as hereinafter more particularly described, and pointed out in the claims.

In describing this invention reference is had to the accompanying drawings, forming views.

Figure 1 is a perspective of my improved harroW-frame, illustrating the general construction and arrangement thereof. Fig. 2 is an enlarged perspective of a single tooth and a detached portion of the frame. Fig.

3 is a vertical sectional view, showing in crosssection the frame-bars, clip-plates secured to said bars, t e tooth-support, the tooth and its clip-plate. Fig. 4 is avertical sectional view taken at right angles to the plane of Fig. 3, with the tooth-support shown in full. Fig. 5

is an elevation of the clip-plate mounted on the frame, and Fig. 6 is a perspective of the tooth clip-plate.

A represents the harrow-frame, composed of frame-bars a, disposed in zigzag form and provided at intervals with bearing-faces a, from which the barrow-teeth B are supported.

As illustrated, the frame-bars are formed rectangular in cross-section, and are arranged with their narrow edges upward; but it will be understood that they may be of any other desirable form and construction, and may be arranged many other suitable manner.

0 represents the tooth-support pivotally supported upon the bearing-faces a of the frame-bars by the clip-plate D interposed between said support and bars.

As illustrated, the clip-plate D is provided on its outer face with a slot cl, adapted to receive the frame-bar and support the clipplate, and at its inner face with an annular bearing (1, here shown as consisting of an an- S 5 nular projecting tongue.

The preferable manner of supporting the tooth-support 0 consists in providing its upper extremity C with an annular bearing 0,

and simplify its construction, in addition to securing the tooth-support to the clip-plate, secures said clip-plate tothe seats or faces a of the harrow-frame bars. It will be noted, however, that as the center of the upper extremity O of the tooth-support is preferably open the securing of the tooth-support to the former clip-plate D is effected by the frictional contact of the annular bearin gs provided upon the separate parts, and in order to render this frictional contact more certain and strong the said annular bearings are preferably formed tapering in cross section, whereby when the bolt E is tightened the parts wedge together.

The lower extremity C of the tooth-support 0 extends downwardly beneath the harrow-frame, and is provided with a tooth-securing face 0 to which is secured the springtooth B. This securing-face is preferably disposed in a curved plane with its rear extremity o upturned in a sharper curve than the forward portion thereof.

I11 order to lighten the tooth-support, the portion thereof interposed between the annular bearing 0 and the tooth-supports C consists of an open web, which also, from its peculiar construction, affords great strength and rigidity. Moreover, this opening between the extremities of the tooth-support is particularly advantageous, since it permits the tooth to be secured to the tooth-support with a single bolt, as its lower face forms a seat for the nut on the bolt G.

The spring-tooth B is preferably secured to the face C of the tooth-support by means of a clip-plate F of desirable form, size, and construction to effect the desired result, and preferably sufficiently thick in cross-section to withstand considerable wear.

The upper face of the tooth clip-plate F is provided with a recess F, adapted to receive the securing extremity b of the spring-tooth B, and formed with side walls F, lapping upon the edges of the securing-face C of the tooth support for preventing side movement of the clip-plate when operatively mounted. The end motion of the tooth is prevented by shoulderf, against which rests the rearof the securing extremity b.

In order to prevent the end motion of the clip, I provide upon the tooth-support a shoulder 0 (here shown as a round p'in,) and upon the tooth clip-plate F a shoulder ft, of suitable form to engage the aforesaid shoulder 0 The tooth clip-plate is securely clamped against the tooth by means of a bolt G, which preferably passes through saidelip-plate tooth and securing-face C and firmly and rigidly secures the tooth to its support C.

(hen for the various purposes it is desired to adjust the tooth of my improved harrow, the bolt E is slightly loosened and the'toothsupport is then swung to the desired position, whereupon the free extremity b of -the tooth swings downward. This particular form of adjustment is very advantageous and desirstructionsas stones, quacln rlzc.

able, since the tooth is rigidly secured upon a support, and that support is partially rotated to adjust the tooth, thereby obviating the necessity of loosening the tooth from the surface to which itis secured. Moreover, as the tooth is secured ata point considerably below the harrow-frame a slight movement of the tooth-supportetfectsagreateramountof movement of the extremity b of the tooth, and consequently the desired adjustment is occasioned.

with a very slight degree of movement of the tooth-support. Moreover, by securing the tooth beneath the harrow-frame I am enabled to form the upper extremity of the tooth-support of less width than the tooth, and thus approximate the harrow-bars closer together and form a more rigid and effective construction of frame.

A further advantage derived from my improved form of tooth-support, which, it will be noted, extends aconsiderable distance below the frame, is that but little friction is occasioned when using the harrow, since the same rides upon the clip-plates F, which are preferably curving, and that thereby all obpass beneath the barrow-frame to the rear thereof,

thus obviating all clogging of the harrow. It

will also be noted that the wear upon the securing extremity I) of the tooth is prevented.- by the tooth clip-plates, and it will be readily understood that when worn these plates can be replaced with new ones, thereby greatly increasing the life of the ha row and rendering the same practically indestructible by friction when in operation. This particular form of harrow is also very light from the peculiar construction of the tooth-supporting device, and is strong and effective in use.

The operation of my invention will be readily perceived from the foregoing description, and it will be understood that the same may be somewhat varied from the described form and construction without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a harrow, the combination of aframebar, a tooth-support having one extremity pivotally supported onsaid frame-bar and the other extremity extended downwardly beneath the frame-bar and adapted to rest upon the ground for forming a support for the frame, and a spring-tooth having one extremity secured to said downwardly-extending extremity of the tooth-support and the other extremity bent upwardly and then downwardly beneath the lower extremity of said support, whereby the depth of cut is regulated, substantially as and for the purpose specified.

2. In a harrow, the combination of a frame composed of zigzag frame-bars, a tooth-support having one extremity pivotally supported between contiguous angles of adjoining frame-bars, and the other extremity extended downwardly beneath the frame-bars and adapted to rest upon the ground for forming a s'upportfor the frame, and a springtooth formed of greater width than the upper extremity of said tooth-support, and having one extremity secured to said downwardlyextending extremity of the tooth-support and the other extremity bent upwardly and then downwardly beneath the lower extremity of said support, whereby the depth of cut is regulated, substantially as described and shown.

In a harrow, the combination of a framebar, a tooth-support having one extremity pivotally supported on said frame-bar and the other extremity extended downwardly beneath the f ra me-bar and adapted to rest upon the ground for forming a support for the frame, a spring-tooth having one extremity secured to said downwa'rdly-extending extremity of the tooth-support, and a clip-plate beneath said extremity of the tooth for preventing wear thereupon, substantially as specified.

4. In a harrow, the combination of a frame composed of zigzag frame-bars, a tooth-support having one extremity pivotally supported between contiguous angles of adjoining frame-bars and the other extremity extended downwardly beneath the [frame-bars and adapted to rest upon the ground for forming a support for the frame, a springtooth having one extremity secured to said downwardly-extendin g extremity of the toothsupport and the other extremity bent upwardly and then downwardly beneath the lower extremity of said support, whereby the depth of cut is regulated, and a clip-plate beneath said former extremity of the tooth, substantially as and for the purpose described.

5. In a harrow,the combination of a framebar, a pair of clip-plates having one face supported on said bar, a tooth-support having one extremity supported on the opposite face of said clip-plate and having its opposite extremity extending downwardly beneath said frame-bar and adapted to rest upon the ground for forming a support for the frame, and a spring harrow-tooth having one extremity secured to said downwardly-extending extremity of the tooth-support and the other extremity bent upwardly and then downwardly beneath the lower extremity of said support, whereby the depth of cut is regulated, substantially as and for the purpose specified. I

6. In aharrow, the combination of a framebar, a pair of clip-plates having one face supported on said bar, a tooth-support having.

one extremity supported 011 the opposite face of said clip-plate and having its opposite extremity extending downwardly beneath said frame-bar and adapted to rest upon the ground for forming a support for the frame, a spring-tooth having one extremity secured to said downwardly-extending extremity of the tootlrsupport, and a clip-plate beneath said extremity of the tooth for preventing wear thereupon, substantially as set forth.

7. In aharrow, the combination of aframebar composed of zigzag frame-bars, clip-plates between the contiguous angles of adjoining frame-bars and supported thereon, a-toothsupport having one extremity pivotally supported by said clip-plates and the other extremity extended downwardly beneath the frame-bars and adapted to rest upon the ground for forming a support for the frame, and a spring-tooth having one extremity secured to said downwardly-extending extremity of the tooth-support and the other extremity bent upwardly and then downwardly beneath the lowerextremity ofsaid support, whereby the depth of cut is regulated, substantially as described. v

8. In a harrow, the combination of a framebar com posed of zigzag f rame-bars, clip-plates between the contiguous angles of adjoining frame-bars and supported thereon, a toothsupport having one extremity pivotally supported by said clip-plates and the other extremity extended downwardly beneath the frame-bars and adapted to rest upon the ground for forming a support for the frame, a spring'tooth having one extremity secured to said downwardly-extending extremity of the toothrsupport, and a clip-plate beneath said extremity of the tooth, substantially as specified. I

9. In a harrow, the combination of a framebar, a pair of clip-plates having one face secured to said frame-bar, an annular bearing upon the other face of said clip-plate, a tooths upport having one extremity provided with an aim ular bearing for engaging the annular bearing of the clip-plate and having its opposite extremity extended downwardly beneath the frame-bar and adapted to rest upon the ground for forming a support for the frame, a bolt for securing said tooth-support to said clip-plate, and a spring-tooth secured to the lower extremity of said tooth-support, substantially as described.

10. In a harrow, the combination of a framebar, a tooth-support having one extremity pivoted on said frame-bar and the other extended beneath the frame-bar and formed with a lower engaging-face disposed in. a curved plane, and a tooth having one extremity secured to said face and the other bent upwardlyand then downwardly beneath said face, substantially as described.-

11. In a harrow, the combination of a framebar, a tooth-support having one extremity pivotally supported on said frame-bar and the other extremity extended downwardly beneath the same for forming a support for the frame, a lower engaging-face on said projecting extremity of the tootlrsupport, a tooth having one extremity secured to said lower engaging-face and the other bent downwardly beneath the same, and a clip-plate secured beneath the former extremity of the tooth and formedwvith its lowenface disposed'in a curved plane, substantially as specified;

1 2. In a h a rrowgthe combination-of a'frmn e bar; a tooth-support having" oneextremity pivotally supported on said frame-bar and the other extremity extendeddownwardly be n'eath the same for forming. asupport forthe frame, aloWer engaging-faceon the lower extremity of the tooth support, an opening in th'e-toot'h-su'pport above said face, atooth mounted upon the en gaging-face; and a clamp for securing said toothto the support, said: clam p having its upper extremity mounted in said opening inthetooth-support, substan tially asset forth.

13. In a harrow, the'comloin-ation of a frame bar, a: pair of clip-platessupported on the f ram e-bar; an an n u lartongue provided upon: the adjacent face of one of said plates, a tooth su pport l h avi ng an 'an nnla'r ring for engaging said ton'gue; a bolt for securing together said i tooth-*supporfi and plates; and a sprhrg-tooth" secured to said tooth-support, substantially as described 14;.- ln aharrow, the combination ofzigza'g frame-bars; cl-i p-plat es bet Ween the contigu' ous=angles-of' adjoining frame-barsand 1 secured there-to, an annular tongue provided upon the adjacent faces ofi said plates; atooth support ha-vin-g an annularring'for engaging ous angles of adjoining frame b'ars;annular bearings provided on the adjacent 'faces of said clip-plates; aztooth-support haV-i one extremity provided withan annular bearing for engagi'n g .t he b'eari ngs upon: the clip-plate,- and having its opposite"- extrein'ity; extended downwardly beneath said frame-bars; abolt" for securing said tooth=support 1 to said plate; 1 and a s pri n'g-tooth secu redto 'the' lower ex trei'nity of said tooth-support, substantially FtS'SGbfOlUhJ.

16*. In a Eli-arrow; the combination of zigzag:

frame-bars,- clip-plates between the contigu-i ou's ngles of adjoining: frame-bars; annular bearings provided on the adjacent' faces of" said "clip-plates; a tooth-support" having one extremity provided with arr annular bearing. for'engagin g 111 e bearings upon the'clipplate, and having its opposite extremity-extended d0Wnwardlybeneatl1 said frame-"bars; a boltfor securing said tooth support to said plate,

a springtooth having one. extremityrsecured to said 1 down \vardly-extending extremity of the tooth-support; and a eiip-p'late beneath'l I said extremity of the tooth, substantially as and for the purposedescribed.- i I 17 In =a' h'a-rrow; thetc'omb'ination of: zigzag.

for engaging the bearings upon the'elip plates; and 'havii-rgrits opposite extreinity ex tended downwardly beneath said frame-hars;v

a bolt forsecuring'said tooth-support to'said':

plates; a shoulder provided on the lower e-=x* tr'em'i ty of said tooth support, a a spring-itoothv having-one extremityasecuredto said' downwardly extending extremity of thetooth=sup= port," a clip-plate beneath: said? tooth; and a: shoulder on said clip-plates foren gagingv' t he shoulder of "the tooth-s upp' pi'even-ti n end mot-ion of'sai-d clipeplate,substantiallyaas and" for the nurpose-"setforth';

Intesti m onywh ereof I have hereunto 'si gned my name, in the presence? of two"- attesting:v

witnesses; at Buffalofin the-county of Eriegini V thef'Sta'te of New York, this 14th day of May; 1890. I

MARQUIS J TODDI Witnessesw HnRRv'HIe M-AN,

G. V-ANAR NAM; 

